Hot top lining



Patented June 30, 1936 UNETED STATES PATENT OFFICE HOT TOP LININGcorporation of Ohio Application October 22, 1934, Seriell No. 749,462

3 Claims.

ioliei" object the povision of e herein. the cubic un coment oi nie iiieeasing f s e @binnen isiie bottoms 'iieie-y require less wnie'n musi'regimes w' .l inc o ill ist listeniieiiy upon ill are elei'eienei ofthe lciioees si'iown 55 Fig. ie is e diegene pien View showing thedifeience ln content at one corner only of the same hol; top when linedaccording to Figs. l to 6 inclusive, and when `lined according to '7 to10 inclusive. Fig. l5 is e. 'perspective view looking in the directionof arrow l5, Fig. i4, showing the increase in velu e of e hot top at onecorne? when the lining oi 'Tigs. l to inclusive is used..

Tile pie em; invention -nas to do Willi linings not ions of the typeillustrated iington Patent ifi,4

El; f'eeluentiy importent capacity as possible for e f nop. f* presentinvention o fu..

e1 h molds 0in over A- e comers ci? -e no". iop. ly volume aise greetiyre oi' 'bile mol ily thus perron-c' inch o'" disience meielllic not once@ lower end this ce ng is provided e l iemei unen which the upper iii*ments ere suppored. The inner anni flow A faces o the ledge :irecovei'ed with a 2i oi refractory materiel, a new bottoni ring ing usedfor each heat. These ings ere attached. izo the casing by wire clipsL53, es more partie uisirly described in Chairman Peteni; l,9i9,292. Awiper strip 26E' serves to close the cieeranee besize.

tween the hottop and the inner surface of the mold, such vwiper stripsbeiner described and claimed in Charman and' Darlington Patent1,804,207.

The casing 20 is generally rectangular in form, although the corners maybe rounded as shown. The inner surfaces of the casing are taperedupvwardly in accordancev with the usual practice.

The lining above the ledge 2i consists of refractory blocks which aremade in such sizes and shapes as to fit the internal surfaces of thecasing and be retained vagainst. inward movement by their owninterengagement. As herein illustrated I employ on each side surface ofthe casing lower and upper lining blocks 2d and 25 respectively. Each ofthese blocks is tapered upwardly, that is to say, the side edges oftheloloclrsv are inclined upwardly toward each other, both at the sameangle. These side edges are also beveled inwardly, as appears clearly inFigs. 3 and 4. The inner face of each of the blocks 2d and 25 is fiat,and each of these faces, or the two together, may be said to have theshape of a symmetrical trapezoid, the upper edge of which is shorterthan the lower edge.

1n the corners of the casing I me corner blocks 26, all of which may beidentical in shape and The inner surface of each of these corner blocksis a rectangle. The side or lateral edges are beveled oi inwardly at theproper 'angle to make a precise fit with-the beveled edges of the blocks2li and 25. The outer surfaces of blocks 26 are of course made toyconform with the corner surfaces of the casing, which in the presentinstance are rounded.

The procedure in assembling the lining elements is to rst place the sideblocks 24 in the casing, then to slide the lower corner blocks 26 intoplace,y when the lower lining course will be locked in position. 'Ihefour side blocks 25 of vthe upper course are then put into the casing,

4 I have illustrated a lining arrangement previously used for arectangular hot top, the side blocks l21 of the lining are straight,that is their side edges do not taper as do the side edges of the blocks24 and 25 of the present invention. The corner blocks 28 and 29 howeverare tapered and the two blocks are consequently of different size.

The side edgesof all blocks are beveled in order to hold all of them inposition.

It will be observed by comparison of Figs. 8 and 11 that the lowersurface of corner block 29 has a greater dimension in a diagonaldirection than.

that of lower corner block 26, in other words corner block 29 extendsfarther into the hot top space than does block 26. In Figs. 7 and 8 Ihave marked the lower forward edge of the block 29 with the referencecharacter a.. 'I'he lowerforward edge of block 26 in `Figs. 2 and 11 ismarked b. In Fig. 14 I have shown diagrammatically both of these loweredges a and b ln their proper positions, and have connected their endswith the ends of the corner line c at the top of the block, which is thesame-in both cases, by lines d and e. of lines a. and b. The resultingwedge-shaped gure, illustrated by itself in Fig. 14, represents tiresaving in refractory at each corner of. the! lining when the lining ofthe present invention, shown in Fig. 2, is used as compared with thelining of Fig. v'7, and the consequent increased capacity of the hot topfor molten metal. 'Ihese figures also provide a visual demonstration ofthe fact that the bull: of this added capacity occurs at and near theybottom of the hot' top where it is of the greatest value.

Line y connects the lower ends It will be observed therefore that byputting the taper on the side blocks rather than on the corner blocks asformerly, I have increased theA capacity of the hot top, principally inthe lower portion thereof, and have consequently accomplished a valuableimprovement. Furthermore the change is effected without any increase inthe number of different lining blocks, all eight of the corner blocksbeing identical.

Having thus described my invention, I claim:

1. In a hot top, a generally. rectangular casing with inner upwardlytapered surfaces and a ledge extending inwardly from its lower end, alining therefor of refractory material supported by said ledge, saidlining comprising corner elements having vstraight sides extending inparallel directions, and said lining also comprising side elementshaving upwardly tapered side edges.

2. In a hot top, a generally rectangular casing having inner surfacestapered upwardly and a ledge extending inwardlyfrom its lower end, alining therefor of refractory material supported by said ledge, saidlining comprising corner elements with beveled lateral edges. saidlateral edges extending in parallel directions throughout their lengths,said lining comprising also side elements with beveled edges adapted tot the beveled edges of the corner elements, said side elements beingtapered upwardly.

3. In a hot top, a generally rectangular casing having inner wallstapered upwardly and a ledge vextending inwardly from its lower end, alin.

' ing therefor of refractory material supported by said ledge,l saidlining comprising corner elements with nat inner faces of rectangularshape and beveled side edges, and comprising side elements having flatinner faces in the form of symmetrical trapezoids with their lower edgeslonger than their upper edges, and having beveled side edgescomplementary to the beveled side edges of the corner elements.

WALTER' w. Ummm.

